Aqueous solution for solubilizing salicylic acid, a method for preparation thereof, and a cosmetic composition comprising the same

A process of producing a salicylic acid and caffeine aqueous solution, the process comprising:

• (a) adding a salicylic acid in an amount of no less than 0.5 to no more than 20 wt % based on the total weight of the salicylic acid and caffeine aqueous solution, caffeine in an amount of about 1 to about 3.75 wt % based on the total weight of the salicylic acid and caffeine aqueous solution, and tromethamine in an amount of at least 90 parts by weight based on 100 parts by weight of the salicylic acid, to water to obtain a mixture, and stirring the mixture,
• wherein the tromethamine acts as a dissolution-enhancing agent to enhance the dissolution of salicylic acid and caffeine,
• wherein the salicylic acid, caffeine, and tromethamine are added to the water in a single step,
• wherein the stirring of the mixture is carried out at a temperature of at least about 85° C.;
• and
• (b) forming a thermally stable salicylic acid and caffeine aqueous solution.